The navigation light on my CC rusted out. It was working out to two weeks ago. Bought a new light, before I completed the installation I hooked the wires from the boat to the new light nothing. I put the wires from new light across the plus and negative posts on battery- unit lit up. Next I used a meter to test the wires coming from the boat- I got 12 volts. The light should work, but when I hook the light to the boat wires the light will not light up. I am totally stumped. Any answers?